But I can't find a way to do it. My program prints the line AFTER the condition is met:
(time, altitude, speed, acceleration)
131, 2698.0264, 377.5607, 0.37098
132, 2320.2818, 377.9270, 0.36182
"##Felix opens his parachute"
133, 1991.2751, 284.9225, -79.22827..